# STC SA7808SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC system 60 Pitch Stabilization System Model ST-478 with Optional Automatic Electric Trim System
- Applied: November 25, 1991
- Status date: December 10, 1991
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A6CE](https://openairdocs.org/tcds/A6CE)
- Certificate PDF: https://openairdocs.org/files/sha256/98/84/988417ce4b33dd1d71bb45dad6dc5ef61072261bd93399ff8117f1099e7a91af
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FADCB63ADFE0EC7486257FF70063FB9D.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7808SW-D

## ADs that name it (0)

None.

## Approved models (12)

- Textron Aviation Inc. 337D ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. 337E ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. 337F ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. 337G ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. 337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. P337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. T337D ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. T337E ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. T337F ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. T337G ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. T337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. T337H-SP ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

rf Staoia Btpartmenr of transportation— federal atriation administration ^opplemcntal 'Cgpc Certificate iSUvmvev SA7808SW-D S-TEC Corporation 946 Pegram Wolters Industrial Park Mineral Wells, Texas 76067 Federal Aviation23 A6CE CESSNA 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G' 337H' P337H' T337H' T337H-SP Installation of S-TEC System 60 Pitch Stabilization System, Model ST-478, with Optional Automatic Electric Trim System, according to Bulletin No. 578, dated 11-21-91 and Master Drawing List No. 92553, dated 11-21-91 and/or later FAA Approved revisions of the above data (28 Volt System).

1. Also eligible on the above models when modified per STC SA937CE (Norton STOL Craft Conversion).

2. Also eligible on the above models when modified per STC SA1627WE (Robertson STOL Conversion).

(See Continuation Sheet, Page 2, a part of this STC.)

11-25-91 12-10-91 Wi 1 1 i'stm J. Thomas DAS Staff Coordinator. DAS 5 SW (Tale)

7~Au artiflcatt mtajf 4c IramftrrtJ in teardtaee unlit FAR 21.47.

ttrard Stain uf aamra Bepartment of Transportation—.federal Station administration Supplemental t:gpe (Certificate(Continuation .Sheet) SA7808SW-D Limitations and Conditions (con't.)

3. FAA/DAS Approved Supplemental Flight Manual, P/N 89950, dated 12-10-91 is required for Cessna Models 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H, and T337H-SP And The Above Models When Modified Per STC SA937CE (Norton STOL Craft Conversion) and/or later FAA Approved revisions of the above supplement.

4. FAA/DAS Approved Supplemental Flight Manual, P/N 89951, dated 12-10-91 is required for Cessna Models 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H, and T337H-SP When Modified Per STC SA1627WE (Robertson STOL Conversion) and/or later FAA Approved revisions of the above supplement.

5. Compatibility of this modification with other previously approved modifications must be determined by the installer.

,\>n alteration of this certificate is punishable by a fine of not exceeding 11,000, or imprisonment not exceeding 3 years, or hnih.

FAA FORM 8110.2-1 <10-«» Thu caltficaU may 4» (ransferrtd in accordantt until FAR ..'I.-/' PAGE 2 OF 2 PAGES

Stnle. and ^1T tode I Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- December 10, 1991: Issued, Current. [certificate](https://openairdocs.org/files/sha256/98/84/988417ce4b33dd1d71bb45dad6dc5ef61072261bd93399ff8117f1099e7a91af)

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